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Old 04-24-2013, 08:41 PM   #1 (permalink)
GoneNomad
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GM fuel operated heater upgrade

I'm looking for anyone knows anyone who has a DMax van with the oem RPO K08 fuel-operated heater (which will only run when the engine is running)
and who would like to be able to run it in standalone mode to pre-heat the engine.

All the previous threads about this here are ones that I started or posted in.
I do not recall anyone else posting on dieselplace.com who has this oem RPO K08 heater, but maybe there was one?

Previous efforts involving trying to interpret the digital signals sent by the BCM to the OEM heater controller went nowhere.
But now there is a cost-effective solution (~$200 + fairly easy self-install) available for ONE DMax van owner.

So if anyone here knows somebody who has a 2009+ LMM/LGH van, with the K08 option, and who wants to make better use of that heater, please let me know.

Posting here is preferable to PMs at this point.

.

Last edited by GoneNomad; 04-24-2013 at 08:42 PM.
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Old 04-26-2013, 02:47 AM   #2 (permalink)
turboawd
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i have the heater on my 06 van. it would be nice to be able to manually control it.
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Old 04-26-2013, 08:49 AM   #3 (permalink)
PiperOne
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Ontario Diesel Place Chapter Member

While I don't have one, I'd be curious to know how you did it. There are a lot of folks in the Sprinter camp who have the same heater that would love to make it run without the engine.

What's the trick?
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Old 04-26-2013, 01:09 PM   #4 (permalink)
GoneNomad
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Quote:
Originally Posted by turboawd View Post
i have the heater on my 06 van. it would be nice to be able to manually control it.
Are you sure that's the OEM heater? This is what it looks like:

I didn't know GM made the K08 option available in 2006MY?
But if that's what you have, then it can be upgraded.


Quote:
Originally Posted by PiperOne View Post
There are a lot of folks in the Sprinter camp who have the same heater that would love to make it run without the engine.
The upgrade for the Sprinter is a lot easier.

Greg Landuyt at Lubrication Specialist sells a kit to upgrade Sprinters.

____________________________________


Part of the reason I'm trying to find out if anyone else has any need/interest in doing this is that I have to order some minor parts (like electrical connectors) and the shipping costs is about as much as just one set of parts. I'd also save a few bucks by ordering more than one coolant pump, too. I know that GM built very few vans with this option, but I also know that anyone who has it would probably like to run it in standalone mode (to pre-heat the engine) if there was a way to do it that wasn't so expensive they might as well replace the entire heater.
Attached Thumbnails
GM fuel operated heater upgrade-cimg2570-k08-foh-r1.jpg  

Last edited by GoneNomad; 04-26-2013 at 01:25 PM.
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Old 04-26-2013, 03:48 PM   #5 (permalink)
GoneNomad
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OEM GM RPO K08 fuel-operated heater electrical connector:



If the connector doesn't look like these photos, it's probably not the OEM heater.
'06-'07 MY has a different electrical system, so I'd guess that the electrical connector is different?
Attached Thumbnails
GM fuel operated heater upgrade-female-side-pin-ids.jpg   GM fuel operated heater upgrade-male-side-pin-ids.jpg  

Last edited by GoneNomad; 04-26-2013 at 03:50 PM.
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Old 04-26-2013, 05:25 PM   #6 (permalink)
GoneNomad
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The GM OEM connector above is a relatively standard "Delphi" GT 150 series connector, which is available from Mouser etc.: Mouser Part # 829-15326842 .
_______________________

The "normal" Espar D5W heater has a different electrical connector that looks like this:


As far as I can determine, while this connector may be some kind of a standard in Germany, it is very difficult to find in the U.S., except on the end of an Espar cable.
The markings on the male connector I have include what looks like the Volkswagen logo, so it may be an OEM VW part.
New Espar cables with this connector can be ordered, but they are VERY expensive.

I did find the matching female counterpart to this connector on the website in the U.K.:

but only on this harness:

which sells for 37.95 + shipping (probably about US$70 total). This little harness is so short that it might require splicing for some applications.
If this seems expensive, it's a bargain compared to the original Espar "main harness" (which is much longer) that costs over $200!
Attached Thumbnails
GM fuel operated heater upgrade-espar-d5w-8-pin-male-electrical-connector.jpg   GM fuel operated heater upgrade-eberspacherparts.com-d5w-heater-female-plug-showing-wire-colors.jpg   GM fuel operated heater upgrade-eberspacherparts.com-d5w-heater-wiring-harness.jpg  

Last edited by GoneNomad; 04-26-2013 at 05:46 PM.
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Old 04-26-2013, 08:17 PM   #7 (permalink)
Spoolin4
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So this mod would enable you to preheat the motor with an electrical heater? Do the heater cores on Diesel's different than on the LS motor vehicles where it uses the engine coolant to heat the cab? I'm a little confused here.

Thanks
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Old 04-26-2013, 08:58 PM   #8 (permalink)
GoneNomad
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What I've described above uses a diesel fuel powered water heater to pre-heat the engine.

Unless you see a heater that looks like the one in the first picture mounted to the inside of the left side frame rail, about where the driver sits, you don't have the OEM K08 heater.

You can however install a regular Espar, Webasto, or a Kingtec Snugger coolant heater (essentially a Chinese copy of an Espar D5W, and it's cheaper).
A dealer in Vancouver told me that their quality control wasn't that great to start when they first came out two years ago, but more recently they've gotten better.

.

Last edited by GoneNomad; 04-26-2013 at 09:25 PM.
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Old 04-26-2013, 09:02 PM   #9 (permalink)
GoneNomad
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Quote:
Originally Posted by PiperOne View Post
There are a lot of folks in the Sprinter camp who have the same heater that would love to make it run without the engine
Come to think of it, my approach requires a little more DIY, but should be less expensive than the Lubrication Specialist kit (I'm not sure how much his kit costs since the site has been unavailable for the last day or so, but IIRC that kit is over $300).

So If you know a Sprinter owner who wants to do this, let me know.

Obviously they'd have to figure out their own wiring connection (like I did for the GM van in the images above).
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Old 04-27-2013, 01:54 AM   #10 (permalink)
turboawd
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Quote:
Originally Posted by GoneNomad View Post
Are you sure that's the OEM heater? This is what it looks like:

I didn't know GM made the K08 option available in 2006MY?
But if that's what you have, then it can be upgraded.



yes, it looks like that.

the heater works in addition to the engine, to warm the engine up. i'm not so sure that the heater alone would warm up the engine. on real cold days, the heater runs continously along with engine to try and keep warm.
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